Police will get an extra $25.7 million over three years above the state government’s controversial 2.5 per cent cap on salary increases for public servants.

The Minister for Police and Industrial Relations, Mike Gallacher, said salaries for police would increase by 2.27 per cent in the first year and superannuation entitlements would rise by 0.25 per cent.

Salaries would increase by 2.04 per cent the following two years and superannuation entitlements would rise by 0.5 per cent.

Officers would also receive a $655 subsidy for their superannuation insurance premiums, costing $25.7 million.

"Under this government, there will be more and better-resourced police than ever before in the history of NSW," Mr Gallacher said.

Opposition industrial relations spokesman Adam Searle said the deal with police had created two classes of public servants.

"This deal breaks the government's own wage cap," he said.

"While the police association is to be congratulated for achieving this for their members, it is an outcome that, on the face of it, looks well over and above the 2.5 per cent cap."

NSW Greens MP David Shoebridge said: "While we welcome any public-sector workers managing to get a fairer deal, this should be available to everybody, not just to those who can twist a political arm."

A spokeswoman for Mr Gallacher said the subsidy for superannuation insurance premiums was "compliant with the government's wages policy" and approved by cabinet's expenditure review subcommittee.

"The government's wages policy [shows] that annual increases in employee-related costs above 2.5 per cent may be provided where equivalent employee-related cost savings are achieved," she said.

NSW Police Association president Scott Weber said the wage deal was endorsed by 80 per cent of his membership. He said the $655 subsidy would offset a 544 per cent increase in superannuation insurance premiums.

"Police officers have a unique and difficult role in protecting the community and maintaining their death and disability scheme and workers' compensation entitlements and a subsidy for their superannuation insurance is paramount," he said.

NSW Nurses and Midwives Association general secretary Brett Holmes said he did not begrudge police getting extra assistance for superannuation insurance. His union would continue to push for a 2.5 per cent wage increase and a reduction in nurse-to-patient ratios in hospitals.